| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 19216 |
33.4%
|
| 2 | yes (memory) | 23036 |
40%
|
| 3 | no | 15169 |
26.3%
|
| 4 | polio campaign | 152 |
0.3%
|
| Sysmiss | 3399 |